90721022 has 16 divisors (see below), whose sum is σ = 155675520. Its totient is φ = 38842008.

The previous prime is 90721021. The next prime is 90721049. The reversal of 90721022 is 22012709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90721021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15053 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (9729720).

Almost surely, 2^90721022 is an apocalyptic number.

90721022 is a deficient number, since it is larger than the sum of its proper divisors (64954498).

90721022 is a wasteful number, since it uses less digits than its factorization.

90721022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 90721022 is about 9524.7583696386. The cubic root of 90721022 is about 449.3340305344.

The spelling of 90721022 in words is "ninety million, seven hundred twenty-one thousand, twenty-two".